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xfs: count inode blocks correctly in inobt scrub 

A big block filesystem might require more than one inobt record to cover
all the inodes in the block.  In these cases it is not correct to round
the irec count up to the nearest block because this causes us to
overestimate the number of inode blocks we expect to find.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-12-12 08:46:26 -08:00
parent c1b4a321ed
commit 2c2d9d3a20
1 changed files with 15 additions and 7 deletions
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22
fs/xfs/scrub/ialloc.c
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@ -44,6 +44,11 @@ xchk_setup_ag_iallocbt(
/* Inode btree scrubber. */
struct xchk_iallocbt {
/* Number of inodes we see while scanning inobt. */
unsigned long long inodes;
};
/*
* If we're checking the finobt, cross-reference with the inobt.
* Otherwise we're checking the inobt; if there is an finobt, make sure
@ -266,7 +271,7 @@ xchk_iallocbt_rec(
union xfs_btree_rec *rec)
{
struct xfs_mount *mp = bs->cur->bc_mp;
xfs_filblks_t *inode_blocks = bs->private;
struct xchk_iallocbt *iabt = bs->private;
struct xfs_inobt_rec_incore irec;
uint64_t holes;
xfs_agnumber_t agno = bs->cur->bc_private.a.agno;
@ -304,8 +309,7 @@ xchk_iallocbt_rec(
(agbno & (mp->m_blocks_per_cluster - 1)))
xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
*inode_blocks += XFS_B_TO_FSB(mp,
irec.ir_count * mp->m_sb.sb_inodesize);
iabt->inodes += irec.ir_count;
/* Handle non-sparse inodes */
if (!xfs_inobt_issparse(irec.ir_holemask)) {
@ -397,9 +401,10 @@ STATIC void
xchk_iallocbt_xref_rmap_inodes(
struct xfs_scrub *sc,
int which,
xfs_filblks_t inode_blocks)
unsigned long long inodes)
{
xfs_filblks_t blocks;
xfs_filblks_t inode_blocks;
int error;
if (!sc->sa.rmap_cur || xchk_skip_xref(sc->sm))
@ -410,6 +415,7 @@ xchk_iallocbt_xref_rmap_inodes(
&XFS_RMAP_OINFO_INODES, &blocks);
if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
return;
inode_blocks = XFS_B_TO_FSB(sc->mp, inodes * sc->mp->m_sb.sb_inodesize);
if (blocks != inode_blocks)
xchk_btree_xref_set_corrupt(sc, sc->sa.rmap_cur, 0);
}
@ -421,12 +427,14 @@ xchk_iallocbt(
xfs_btnum_t which)
{
struct xfs_btree_cur *cur;
xfs_filblks_t inode_blocks = 0;
struct xchk_iallocbt iabt = {
.inodes = 0,
};
int error;
cur = which == XFS_BTNUM_INO ? sc->sa.ino_cur : sc->sa.fino_cur;
error = xchk_btree(sc, cur, xchk_iallocbt_rec, &XFS_RMAP_OINFO_INOBT,
&inode_blocks);
&iabt);
if (error)
return error;
@ -440,7 +448,7 @@ xchk_iallocbt(
* to inode chunks with free inodes.
*/
if (which == XFS_BTNUM_INO)
xchk_iallocbt_xref_rmap_inodes(sc, which, inode_blocks);
xchk_iallocbt_xref_rmap_inodes(sc, which, iabt.inodes);
return error;
}